Interdigitating Dendritic Cell Sarcoma (IDCS) is a very uncommon neoplasm embedded in the group of histiocytic and dendritic cell neoplasms. IDCS is a diagnosis of exclusion, being mandatory the preclusion of follicular dendritic cell sarcoma, histiocytic sarcoma, melanoma, and metastases, among another neoplasm. The clinical course is aggressive. ...

Histiocytic Sarcoma (HS) is a rare hematologic malignancy that belongs to the group of histiocytic and dendritic cell neoplasms. The causal etiology of HS is unknown. The clinical course is very aggressive.